PT  - JOURNAL ARTICLE
AU  - S Ahmad
AU  - J Laidlaw
AU  - G W Houghton
AU  - A Richens
TI  - Involuntary movements caused by phenytoin intoxication in epileptic patients.
AID  - 10.1136/jnnp.38.3.225
DP  - 1975 Mar 01
TA  - Journal of Neurology, Neurosurgery & Psychiatry
PG  - 225--231
VI  - 38
IP  - 3
4099  - http://jnnp.bmj.com/content/38/3/225.short
4100  - http://jnnp.bmj.com/content/38/3/225.full
SO  - J Neurol Neurosurg Psychiatry1975 Mar 01; 38
AB  - The case histories of four patients who developed choreoathetoid movements during intoxication with phenytoin are presented. Drug intoxication was confirmed in each case by measuring the serum phenytoin concentration. Drug interactions were, in part, responsible for the occurrence of intoxication in three of them. Phenytoin intoxication is not always easy to recognize, particularly when nystagmus is minimal or absent, as in these four patients. The estimation of the serum phenytoin concentration is invaluable in this situation.